Javascript boolean logic error

Question

My code:

var old = localStorage.getItem('GotoBeginning');
console.log("old is "+ old);
if (old===true) {
  console.log("Returning true");
  $("#gobeg").prop('checked', true);
  return true;
} else {
  console.log("Returning false");
  $("#gobeg").prop('checked', false);
  return false;
}

The value in localStorage for GotoBeginning is true. My console.log shows:

old is true
Returning false

I expected the following output:

old is true
Returning true

nem035 · Accepted Answer · 2018-02-02 21:50:58Z

2

The storage api in the browser only stores strings. This should work:

if (old === 'true') {
//          ^    ^

} else {

}

As mentioned in a comment by IrkenInvader, you can extract the proper type like so:

var old = JSON.parse(localStorage.getItem('GotoBeginning'))
// now old will be a proper boolean so this will work
if (old) {

} else {

}

edited Feb 2, 2018 at 21:50

answered Feb 2, 2018 at 21:48

nem035

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2 Comments

IrkenInvader Over a year ago

or use JSON.parse(localStorage.getItem('GotoBeginning'));

proofzy Over a year ago

And also try to: console.log('retrievedObject: ', JSON.parse(old));

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